毛片在线观看AV_久久精品国产亚洲αV麻豆网站_在厨房被c到高潮_亚洲国产男人的天堂你懂的_国产极品粉嫩馒头一线天_最近更新中文字幕手机版_午夜视频等优质视频资源_亚州性夜夜射在线观看_高清无码人妻精品内射视频_2021中文字幕无码免费

Cupronickel blackening agent，Copper-nickel alloy blacking agent，Copper blackening agent at ambient temperature

Cupronickel blackening agent，Copper-nickel alloy blacking agent，Copper blackening agent at ambient temperature

1. Product code : Q/YS.128(yishun brand)

2. Scope of application:

This product is suitable for the black treatment of white copper (copper and nickel alloy). The workpiece can be used as jewelry, can improve anti-corrosion, the product is environmentally friendly and non-toxic.

3. Product indicators：

(1) the proportion of > 1.0

(2) PH > 7.0

(3) A colorless, transparent, odorless liquid

(4) The product is also shipped with black additives

4.Product usage:

(1) adding copper concentrate black agent 3 times of tap water and form a black working liquid, with a heater (or material such as stainless steel heater) heated to 65 ℃, and then add black in per kg of working liquid additives for 25 to 30 grams of mix

(2) the degreasing derusting (or chemical polishing) good copper pieces, soaked in black agent, soak 5-10 minutes, soaking in the process of turning workpiece, make cupronickel workpiece black uniform. After taking out the copper workpiece, a dense black film can be found on the surface of the workpiece.

5. Matters needing attention：

(1) Remove oil, rust, or chemical polish before turning black to make the surface even and clean

(2) It is necessary to replenish the original solution and additives of the hair darkening agent

(3) This product is environmentally friendly but corrosive. Do not contact with skin or eyes.

Other processing：Environmental degreer and rust remover、Brass whitening agent、Brass Green Chemical polishing Agent、Electroless plating of real gold on copper surface、Strong oil stain removal agent、Environmental non-cyanide gold removal liquid、Copper malachite green colorant